Surfactant is educted into batch with the water through a mill........and yes, tank was passivated once installed and cleaned. It has manufactured 6 batches since its installation, but this batch is the first with the high active surfactant....
We recently compounded a shampoo formula in a brand new stainless steel vacuum tank. All product contact surfaces are 316L. We introduced the high active surfactant into the batch with 80°C water as the disperser (through a shear mill). After the batch was completed, dropped and cleaned, we...